Added functions to set/read cookies; added ability to make the collapsed nav sticky across refreshes

assets/coffee/gargoyle.coffee

@@ -1,6 +1,8 @@
 $(document).ready( ->
 
   $('#nav-toggle').on('click', toggleNav)
+  if getCookie('navCollapsed') == 'true'
+    $('body').addClass('collapsed')
 
 )
 
@@ -8,5 +10,26 @@ toggleNav = () ->
   bodyElem = $('body')
   if bodyElem.hasClass('collapsed')
     bodyElem.removeClass('collapsed')
+    setCookie('navCollapsed', 'false')
   else
     bodyElem.addClass('collapsed')
+    setCookie('navCollapsed', 'true')
+
+getCookie = (cName) ->
+  name = cName + '='
+  cDecoded = decodeURIComponent(document.cookie)
+  #to be careful
+  cArr = cDecoded.split('; ')
+  res = undefined
+  cArr.forEach (val) ->
+    if val.indexOf(name) == 0
+      res = val.substring(name.length)
+    return
+  res
+
+setCookie = (cName, cValue, expDays = 30) ->
+  date = new Date
+  date.setTime date.getTime() + expDays * 24 * 60 * 60 * 1000
+  expires = 'expires=' + date.toUTCString()
+  document.cookie = cName + '=' + cValue + '; ' + expires + '; path=/'
+  return